Improve FreeIPA debug logging a bit

Committing without review as this is pretty trivial and I've
had it on staging for the last few days without issue. Just gets
us somewhat better info for debugging FreeIPA issues.

lib/installedtest.pm

@@ -54,6 +54,9 @@ sub post_fail_hook {
     unless (script_run "tar czvf /tmp/var_log.tar.gz --exclude='lastlog' /var/log") {
         upload_logs "/tmp/var_log.tar.gz";
     }
+
+    # Sometimes useful for diagnosing FreeIPA issues
+    upload_logs "/etc/nsswitch.conf", failok=>1;
 }
 
 1;

tests/realmd_join_sssd.pm

@@ -17,6 +17,10 @@ sub run {
     repo_setup();
     # do the enrolment
     assert_script_run "echo 'monkeys123' | realm join --user=admin ipa001.domain.local", 300;
+    # set sssd debugging level higher (useful for debugging failures)
+    # optional as it's not really part of the test
+    script_run "dnf -y install sssd-tools", 180;
+    script_run "sss_debuglevel 6";
 }
 
 sub test_flags {